The Precision Pocket Card Carrier for iPhone 4/4S from KILLSPENCER is specifically designed to carry up to 3 cards – 1 license, 1 credit card, and 1 debit card in the most minimal structure they could imagine. Made entirely by two craftsmen in Los Angeles the case features an internal, finely tuned Flat Spring Card Lock mechanism, which ensures that no cards will fall out. Available now for $89 USD at KILLSPENCER.